Burner



i6, 1945. Q FOR-ns 2,386,848 x BURNER Filed July 28, 1944 Patented Oct. 16, 1945 BURNER Oscar Fortis, Chicago, lll., assignor to Automatic Burner Corporation, a corporation of Illinois Application July 28, 1944, Serial No. 546,985 I Claims.

This invention relates to burners, and more particularly to a burner adapted to` use either liquid and gaseous fuels separately or both simultaneously.

The primary object of the invention is to provide an improved gas manifold in the bottom of a tubular burner, which will permit liquid fuel or gas fuel to be burned efficiently and without special adjustment when changing from one type of fuel to another.

The invention is illustrated in a preferred embodiment in the accompanying drawing in which Figure l is a top plan view of a tubular burner embodying the invention, with the top plate removed; Figure 2, a vertical sectional view taken as indicated at line 2-2 of Fig. 1; Figure 3. an enlarged fragmentary sectional view taken as indicated at line 3-3 of Fig. 1; and Figure 4, a sectional view showing a portion of the improved gas manifold.

In the embodiment illustrated, a metal supporting base 5 is provided with a pair of spaced liquid fuel grooves 6 and upstanding offset ange members 1, which pr'ovide seats for inner and outer perforated sleeves 8 and 9, respectively. The central portion of the supporting base is open, as

indicated at I0, to permit air to circulate upwardly and through the perforations in the sleeve 8. 1

The base member has a series of holes II, through which extend a series of tubular air conduits I2. As shown in Figure 2, each of the air conduits has an outwardly extending ringlike shoulder I3 on which the gas manifold rests, and the lower end portion of the conduit is crimped under the base member, as indicated at I4 so as to be secured thereto. Each of the air conduits extends through the gas manifoid,and the top portions of the conduits are crimped thereover so that the .manifold is securely attached to the base 5.

The gas manifold VI5 is in the form of a closed I annular chamber, and has a series of upper and lower registering apertures I6 which fit snugly over the air conduits I2. The baseportion of the manifold is widened and provides seats I1 to support a pair of perforate sleeve members I8 and I9 between the sleeve members 8 and 9. The four sleeves thus form an annular inner combustion chamber 20 and a concentric outer annular combustion chamber 2I. The usual cover plate 22 may be provided with openings 23 over the combustion chamber 20, and the cover is .shown with slightly less diameter than the sleeve v 9, to leave openings at the top of the combustion I chamber 2|.

The gas manifold I5 is provided in its lower portion with a series of small upwardly directed apertures I5a, which communicate with the lower end of the combustion chambers 20 and 2|.

'I'hese apertures may vary in accordance with the burner size, but a number 54 drill size has been found satisfactory for the most popular size of burner. apertures communicating with the inside combustion chamber and the number communicating with the outside combustion chamber is about two to three. It is preferred to have the apertures as close to the bottom plate of theI manifold as possible, and to have them directed upwardly so that when liquid fuel and gaseous fuel are burned simultaneously there will be a better mixture of the oil vapor and gas. j

As shown in Fig. 2, an oil supply pipe 24 communicates with the groove 6 in the supporting base, and a gas pipe 25 extends through the base and communicates with the inside-of the manifold I5. As the manifold is tightly closed, a slight pressure is built up within the manifold and it is adapted to the use of either low pressure gases or bottled gases. The burner is practically foolproof, as air does not enter the gas manifold.

'I'he unit may be provided with a pilot light and automatic ignition, if desired, but a match lighter 26 of known construction has been illustrated.

Preferably, when both gas and liquid fuel are to be used together, the gas is lighted first, and will quickly heat up the unit for proper vapor-1 ization of liquid fuel. This will enable the oil to be burned without wicking, as the gas serves as a starter or preheater. When theliquid fuel is then admitted to the pipe 24, the two fuels will burn with a clean, eflicient flame. It has been found that suiicient air will enter through the perforations in the combustion chamber to provide proper combustion for either of the fuels or both in combination.

The foregoing detailed description'is given for clearness of understanding only, and no unnecessary limitations should be understood therefrom, for some modifications will be obvious to those skilled in the art.

I claim:

1. A range burner for liquid and gas fuels, comprising: four concentric vertically disposed perforate sleeves affording a pair of spaced combustion chambers; a supporting base for said sleeves The ratio of the number of manifold providing a liquid fuel groove beneath each of said combustion chambers; a source of liquid fuel supply for said groove; a closed annular manifold mounted on said base above the liquid fuel grooves and having a plurality of small apertures communicating with the lower ends of the combustion chambers; and a source of gaseous fuel supply for said manifold.

2. A burner as specified in claim l, in which the apertures are near the base of the manifold and are inclined upwardly into the combustion chambers.

3. In a range burner for liquid and gas fuels: an open centered supporting base having annular grooves for liquid fuel, said base having offset inner and outer flanges to form seats; a pair of upwardly extending annular'sleeves mounted in said seats; a plurality of upwardly extending tubularair conduits between said seats and extending through said base and secured thereto; an annular gas manifold having a plurality of sets of registering upper and lower openings encircling said air conduits which supports the manifold, said manifold having an inner seat and an outer seat between the flrst mentioned pair of sleeves; and a second pair of upwardly extending annular sleeves mounted on the seats of said manifold and forming a pair of spaced concentric tubular combustion chambers, said manifold having a plurality of small apertures communicating with the lower ends of said combustion chambers.

4. A burner as specified in claim 3, in which the air conduits are each provided with an outwardly extending shoulder on which the base of the manifold rests.

5. A burner as specified in claim 3, in which the air conduits are each provided with an outwardly extending shoulder on which the base of the manifold rests, and the upper ends of the conduits are crimped over the top face of the OSCAR FORTIS. 

